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(a) Bar plot demonstrating frequency of month of admission among WNND patients. Bars represent the absolute count of patients presenting in each month. (b) Distribution of cases within New York City. Grey lines indicate the outlines of zip codes within New York City, with shading indicating the number of patients with home addresses in each zip code. Not shown are 3 zip codes in New Jersey (07010, 07701, 079101) with one case and 1 zip code in Yonkers with 2 patients (10704).
